If your boat is still not sitting correctly, go over your boat trailer from step 1, and see which part of your boat trailer is not sitting correctly with your boat. Just make note of how much … The width of our bunks adjust for boats 6’ to 8’6” wide. It would be interesting to learn more about how the rollers play a role in the transportation of a boat.Overtime many boat owners in America will come to the point that they will need to either replace their existing boat trailer bunks or repair their existing bunk guides due to constant wear and tear. This would be a simple process of loosening the bow stop/ladder mount U-bolts and moving it back 2-3 inches and re-loading boat. This should follow the shape of your boats keel and allow for an easier launch when at the boat ramp.Once you are happy that your boats keel is resting on your boat trailers keel rollers, it is time to make the adjustments to your Your boats bunks will vary by boat manufacture as to were the trailer bunk guides will be resting. I found it interesting when you mentioned that it is important to check the rollers on a boat trailer regularly to ensure safety. Like your boat, your boat trailer's bunks--the padded, adjustable skids the boat sits on while on the trailer--will require occasional adjustment to carry your boat properly. In a similar way as you did with the rollers, unscrew each bolt with the adjustable screw and reposition the trailer bunks so that they touch the boat, taking particular care not to place your finger between the bunk and the boat. Most pontoon boats with 8’ wide decks usually have 72” bunk centers. If they are; Great! If you own carpet bunk guides you will no doubt notice that they constantly need replacing much faster than plastic boat trailer bunks. Plastic boat trailer bunks on the other hand for aluminium boats last much longer and have a far greater life span and performance rating. Adjust the bunks if your boat is setting on the keel, but is "tipsy" on the trailer. Loosen your Once you have finished the first side of your boat you decided to adjust, repeat the same process with the opposite side.When done correctly, your boat should not be ‘tipsy’ and should be resting firmly on both boat trailer bunks as well as your keel rollers. The nose cones on pontoons angle up like the bow of a canoe and cannot be supported. Pontoon boats with U shaped pontoons or shapes other than round will vary. Watch the boat coming up the trailer and make sure the bottom is clearing the frame and fenders and the bunks are positioned flat against the hull. It only takes a few minutes to measure and … Use your adjustable wrench to loosen the bolts that hold the bunk supports in place on the trailer.Raise the forward end of the bunk until it touches the bottom of the boat and tighten the forward-most bolt. Adjust your brackets as required, so that all Check the stability of your boat trailer bunks after each time you launch and retrieve your boat. If this happens, adjust them accordingly back to their original resting position. If it is not, use your adjustable wrench to loosen the bolts that hold the keel roller in place. To retrieve your pontoon onto a bunk style pontoon trailer, back the trailer down the launch ramp getting the trailer as deep into the water as possible. Rarely do dealers put in any work to make sure the boat trailer has been adjusted to suit the customers new boat. Repeat until the whole bunk touches the bottom of the boat and all the bolts on the bunk have been tightened.Will Charpentier is a writer who specializes in boating and maritime subjects. If the pontoon trailer isn’t adjusted perfectly to fit your pontoon, it’s easier to make the necessary adjustments before the boat is on the trailer. A trailer for a 20’ pontoon may have 15’-16’ bunks. Once placed correctly, retighten the screw. Starting at the front of the boat, raise the keel roller until it touches the bottom of the keel.